ACK: [SRU][P][PATCH 0/1] Plucky fails to boot on (older) Macs (LP: #2105402)

[Stefan Bader]

On 08.05.25 09:19, Juerg Haefliger wrote:
> BugLink: https://bugs.launchpad.net/bugs/2105402
> 
> [Impact]
> 
> MacBookAir7,1 (i5-5250U)
> MacBookPro12,1 (i5-5287U)
> iMac14,1 (i5-4570R)
> 
> With three older Macs I am trying Plucky versions from the past two weeks or so fail to boot.
> 
> The built-in displays stay blank but the backlight is visible until I force the computers to power off. External video doesn't show anything.
> 
> I have tried both installed (more below) and live images. With the live image the GRUB menu with "Try or install" does show up.
> 
> All three do boot normally to 24.10 live images. The iMac has 24.10 installed which also boots fine.
> 
> The two MacBooks have Plucky installed, one upgraded from an earlier version and one installed several weeks ago. Plucky booted fine until around 2025-03-16 when this boot issue started, both with the installed version and the live image. I know this because it caused me to set these aside until now when I had a chance to look closer and find a non-Mac computer that I installed on that date.
> 
> [Test Case]
> 
> Boot on above mentioned Macs.
> 
> [Fix]
> 
> Enable efi hack only on arm64.
> 
> [Where Problems Could Occur]
> 
> Non-arm64 machines that need this fix (highly unlikely) might not boot.
> 
> Juerg Haefliger (1):
>    UBUNTU: SAUCE: hack: efi/libstub: enable t14s boot failure hack only
>      on arm64
> 
>   drivers/firmware/efi/libstub/efi-stub-helper.c | 6 ++++++
>   1 file changed, 6 insertions(+)
> 


Acked-by: Stefan Bader <stefan.bader at canonical.com>
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